/**
 * Copyright (C) <2021>  <chen junwen>
 * <p>
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * <p>
 * You should have received a copy of the GNU General Public License along with this program.  If
 * not, see <http://www.gnu.org/licenses/>.
 */
package io.mycat.calcite.sqlfunction.datefunction;

import com.github.sisyphsu.dateparser.DateParserUtils;
import org.apache.calcite.schema.ScalarFunction;
import org.apache.calcite.schema.impl.ScalarFunctionImpl;
import org.apache.commons.lang3.time.DateFormatUtils;

import java.time.Duration;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class SubTimeFunction extends MycatDateFunction {
    public static ScalarFunction scalarFunction = ScalarFunctionImpl.create(SubTimeFunction.class,
            "subTime");
    public static SubTimeFunction INSTANCE = new SubTimeFunction();

    public SubTimeFunction() {
        super("SUBTIME",
                scalarFunction
        );
    }

    public static String subTime(String time1, String time2) {
     return   AddTimeFunction.addTime(time1, time2,true);
    }

}
